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2006年8-10月极星号ANT/XXIII-7航次,对南极威德尔海西北海域浮冰区进行海冰综合考察,采用海冰物理学、海冰化学和海冰生态学等多学科现场同步观测取样与分析研究新方法。结果显示,测区21个冰站不同冰龄和不同结构类型的海冰冰芯,叶绿素a含量总平均值为16.56μg/dm3,范围为2.10~84.40μg/dm3,叶绿素a相对总量的R值均值为0.79~0.83。冰体叶绿素a含量与分布取决于海冰冰晶物理结构及其所处冰层部位,并和海冰生成环境、冰体发育和成冰过程密切相关。研究结果证实南极冬季海冰叶绿素a含量普遍处于较高水平,海冰冰藻具有较强活性,由此表明从整体上南极冬季海冰具有较高初级生产能力。这对正确分析估算冬季南极海洋生物生产,重新评估南大洋碳通量及其在全球气候变化中的贡献,具有重要科学意义。
The polar ice ANT / XXIII-7 voyage from August to October 2006 conducted a comprehensive sea ice survey of the ice floe area in the northwestern Wedere Sea, Antarctica, using multi-disciplinary scenes of sea ice physics, sea ice chemistry and sea ice ecology Synchronous observation sampling and analysis of new methods. The results showed that the average chlorophyll a content of sea ice cores with different ice ages and different structural types at 21 ice stations in the survey area was 16.56 μg / dm3, ranging from 2.10 to 84.40 μg / dm3. The R value of chlorophyll a relative to the total The mean value is 0.79 ~ 0.83. The content and distribution of chlorophyll a in ice body depend on the physical structure of sea ice ice crystal and the ice layer where it is located, and are closely related to sea ice formation environment, ice body development and ice formation. The results confirm that sea ice chlorophyll a content in Antarctic winter sea ice is generally at a high level, and sea ice ice algae are highly active, indicating that the Antarctic winter sea ice has relatively high primary productivity as a whole. This is of important scientific significance for the correct analysis and estimation of the Antarctic marine life in winter and for the reevaluation of the Southern Ocean carbon flux and its contribution to global climate change.